Sewing-machine.



A. R. SCHOENKY.

SEWING MACHINE.

APPLICATI'O-N men SEPT. 13. 1913.

Patented Feb. 13, 1917.

AUGUST R. SCHOENKY, SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO THE REECE SHOE MACHINERY COMPANY, OFBOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

SEWING-MACHINE.

Patented Feb. 13, mm.

Application filed September 13, 1913. Serial No. 789,624.

To all whom it may concern:

Be it known that I, AUGUST R. SCHOENKY, a citizen of the United States, residing. at Somerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a. specification, reference being had therein to the accompanying drawing.

This invention relates to sewing machines,

and more particularly to that class of machines used in the manufacture of shoes by the welt system wherein the outsole and welt are sewed together. Since the present invention is shown as applied to the type of sole sewing machines already known and illustrated in prior applicatlons and patents, it will be unnecessary herein to fully describe all portions of the machine.

An object of the present invention is to generally improve and simplify the construction and operation of sole sewing machines so as to give better results.

A special object hereof is in connection with an unsewed shoe having a preformed groove around the welt. It is sometimes desirable to form such a groove in a previous operation upon the shoe. In such cases it is sometimes desirable to guide the advancing shoe in the sole sewing machine by said groove through a small projecting guide which merely engages the groove, but does not cut the leather; and such guide may sometimes be useful in slightly opening up the preformed groove to facilitate the admis sion therein of the thread forming a line of stitches.

To the attainment of such objects and advantages the present invention consists in the novel combinations, arrangements, devices and parts set forth, described and illustrated in the following description and accompanying drawings.

' 3 and at are detailed views of parts shown in Figs. 1 and 2.

Fig. 5 shows a detailmodification in front elevation.

Fig. (3 in right elevation shows the relation of the shoe to the mechanism; and Fig. 7 shows a detached detail of Fig. (3.

'The parts are shown in the drawings at that stage in operation at the end of the complete downward movement of the takeup when the stitch is completed.

The same reference numerals designate corresponding parts of the several figures.

The shoe X is composed of the upper to previously attached to the inner sole and the welt m and the outsole :12 which is to be attached to the shoe, in this machine. Opposite the, usual outsole channel is the shallow welt gutter m which has been previously I Extending upwardly from any convenient base is the post 1, supporting at its upper end the head, or casting, which will be of a complicated structure unnecessary to describe, it affording support for various of the working or non-working machine parts hereinafter to be referred to. The main shaft runs inthe upper part of the machine, extending from left to right, and supported in bearings or brackets 4. At the left end of the shaft, is pulley 5, which may be engaged by a belt for driving the machine. Carried on the shaft are three cam disks 6, 7 and S. A bracket 9 carries the retainer 11 for the usual shuttle which contains the usual bobbin retained by arm 14. Pipes 15 and boxes 16 and 17 for steam heating the various parts are shown.

The main active and cooperating instrumentalities in the present machine comprise the following, shown herein, and whose construction and connections will be hereinafter described, namely a work support 21, having an upwardly extending guide flange 22 at its rear; a presser-foot 23, above the work support; an awl beneath, and a needle 25 above the work support; the movable needle guide 26, following up the needle in its curved movement to support it against breakage; the thread looping hook 27, and the thread looper 28 beneath the work support; the thread lifting hook 29 above the work support and adjacent to the shuttle. There is also a thread pulling device 30 of a resilient nature, usually referred to as an auxiliary take-up, together with a main take-up 31 Before referring more particularly to the construction of the above enumerated instrumentalities, bearing reference Nos. 21 to 31 inclusive, I will refer generally tothe arrangement of cams, so that the function and I location of each cam maybe understood in advance of the description of the connections from the cam to the instrumentality actuated thereby. The right-hand cam disk 6, Fig. 1, contains on its right-hand surface a cam 33, for actuating the main take-up 31. Cam disk 6 on its periphery contains cam or groove 3%,

for causing the toand-fro movement of the feed slide which carries the awl. (Jam disk 6 at its left face contains a cam 35, for actuating the thread lifting hook 29.

Cam disk 7 at its right-hand side contains cams for automatically operating the Cam disk 8 at its right-hand face contains two cams or grooves not shown, but

serving in. a well-known manner for actuating respectively the thread looping hook 27 and the needle 25. Cam disk 8 at its periphery contains cam 41, having connections for moving the looper 28 to right and left. Cam disk 8 at its left face contains two cams, the outer one, and'an inner one, not

shown, both taking part in the operation of the shuttle.

An additional cam disk 43 is shown between the bearing 1 and the pulley 5., This at its right face possesses a cam groove havin connections for operating the needle guide and at its left face a cam groove having connections for reciprocating the thread measure hereafter to be described. The shaft is also provided with a shoulder disk 91 having connections, unnecessary to describe, for automatically releasing the presser foot upon the stoppage of the machine.

The feeding-of the work herein is preferably efi'ected by means of the awl, the latter being shifted in an advancing direction while engaged in the work, and returned to its original position after disengagement from the work. The following is a convenient mechanism for accomplishing this function.

The work is fed by the awl which shifts while engaged in the work. A feed slide 45 carries the awl and. slides in a guide 44. Be-

tween the slide 45 and the awl is the post 46. It will be unnecessary to describe the parts numbered 49 to 58 between the feed slide 45 and the cam 34 in the cam disk 6, excepting to-state that the handle 54, byadjusting rod having a projection 88 arranged to serve this purpose in a mannerexplained in my Patent No. 1,171,466, February 15th, 1916.

- In some cases shoes brought to a sole sewing machine are already provided with a slight gutter or groove formed around the welt adapted to receivethe line of stitches and improve the appearance of the work. In order to make use of such preformed groove for assisting the guidance of the shoe during the sewing, and in order also to slightly open up the groove wherever it may need opening to properly receive the stitches, the following devices may be provided, al-' though the same are not essential nor always desirable, to the attainment of the best results in the finished article. Referring to the drawings, a small member 100 that may be termed a guide is shown, this having a wedged or slightly rounded extremity incapable of cutting the material and located, for example, within the usual opening of the work support 21, in. position to enter the preformed welt groove and travel along the same in advance of the stitching. This guide member 100 may be mounted in any suitable way,.movable, for example, so as to permit readjustment of its position in case that is desired during the stitching of a shoe or at other times. The guide 100 is shown as havin a downwardly extendinmshank 101', whic is engaged in a vertical s eeve or barrel 102, suitably fixed in the machine. The mounting may be as in Figs. 1, 2 and 3, permitting positive control of the guides shifting, or as in Fig. 5, where spring control permits a yielding. Thus, in, Fig. 5, aspring 103, confined in the barrel 102, tends to raise the guide which latter is provided with a stop pin 104 engaged in a short lateral slot 105 in the barrel so as to limit the upward movement. The spring will cause the guide to press yieldingly into the welt groove for the purpose specified, and when the welt groove terminates or is absent the guide yields and becomes inoperative.

The positive guide control of Figs. 1,- 2 and 3 involves a long guide shank 101, havinga cross slot near its. bottom end engaged by a double acting Wedge member 106, movable horizontally through slots in the wall of the barrel 102. The member 106 may be moved in any manner, for example, automatically. The horizontally extending base 107 of the barrel 102 is seen in Fig. 2 to be slotted forming a guide and support for the nates then the adjustment of the guide 100 can conveniently be effected by a simple connection whereby the shifting of the handle.

5 causes the Wedge member 106 to shift. Such simple connection is shown thus; if link 51 be pulled toward theobserver in Fig. 2 for readjusting to increase the stitch length, it operates through link 108 to swing the arm 109 of a lever whose short arm 110 has a pin and slot connection with the top .side of the member 106 so'that said member is moved to the right, pulling the guide 100 downward into inoperative position. Likewise moving the handle 54 from the observer to shorten the stitch length at another point automatically forces the guide upward into operative position. The dwell at the left end of member 106 gives lati tude in varying the-long-stitch length.

By the described mechanism the preformed welt gutter is caused to assist in the guidance of the shoe during stitching, at a point in advance of the stitching, so that the line of stitches is sure to be accurately 40 placed.

The machine may have the usual tension 1; 118 which may be in the form of a grooved wheel, the rotation of which is resisted by friction devices including sp-ring 121 adjusted by device 122. The take-up 31 is on a shaft, not shown, extending to the right. Parts 138 to 147 of the thread measuring device are indicated, but these require no description.

The take-up arm 31 is fixed at the left end of atransverse shaft which extends through to the right-hand side ofv the machine where at its extremity it is provided with a second arm 125 connected by a link 126 with the extremity of an arm 127 of a lever pivoted at 128 and having a second arm 129 projectin upwardly to where at its extremity is provi ed a stud 130 engaging the operating cam groove in the right faceof the cam disk to project upwardly in proximity to the 6, so that the rotation of the main shaft acting through the train of mechanism described effects the up and down reciprocation of the take-up lever or arm 31. It will thus be seen that there has been described a sewing machine embodying the principles and attaining the objects and advantages of. this invention and other advan tages will be apparent to those skilled in the art. Since many matters of design, arrange ment, combination, detail and other features may be modified in various ways without departing from the principles involved, no limitation is intended to such features except as specified in the appended claims.

What is claimed is: 7'5 1. In a two-thread lock-stitch shoe outsole stitchin machine for a shoe having a channel preformed along its outsole and a shallow gutter preformed along the face of its welt, the combination of a Work support on top of which theinverted shoe is supported and fed with theface of the shoe welt against the top side of the work support and the shoe upper against the edge of the support, a curved hooked needle, a work feeding awl, and a welt-gutter-engaging guide arranged to project upwardly in proximity to the-work support so as to be engaged by the preformed welt gutter for guidance of 'theshoe as the stitching 'pro- 'gresses, whereby the stitching at the ,welt

side of the shoe is accurately counter-sunk.

2. In a two-thread lock-stitch shoe outsole stitching machine for a shoe havin a channel preformed along its outsole an a shallow gutter preformed along the faceof its welt, the combination of a work support on top of'which the inverted shoeis supported and fed with the face of the shoe welt against the top side of the work support, a curved hooked needle, work feeding means, a shiftable welt-gutter-engaging guide incapable of cutting the material and arranged work support so as to be engaged by the preformed Welt gutter for guidance of the shoe as the stitching progresses, a device for adj usting the work feeding means to alter the stitch length at. suitable times, and connections whereby the adjustment of said device 110 automatically shifts said welt-gutter guide. between operative and inoperative position.

In testimon whereof I aflix my signature in presence 0 two witnesses.

AUGUST R. SCHOENKY. Witnesses: 'J. WARREN NIoHoLs,

WM. C. BOISVERT. 

